All clothing is fumigated before coming into the US. So if you want your clothes to still have the fumigation on them, don't wash them

However, if you're like me and would really rather not have all that fumigation on them....wash your clothes!!!
This is, of course, assuming they are not made in the US, because it's very very rare to find clothing that IS made in the US! Not one item of clothing in Bloomingdales and Macy's is made in the US I know, but maybe some Disney stuff is. Check your tags. If it's not in the US, remember the anti-bug juice you're putting on your kids if you don't wash them!